Kratt et al. (2006) demonstrate the effectiveness of using a field-portable ASD Fieldspec spectroradiometer and satellite-based Advanced Spaceborne Thermal and emitted Reflectance Radiometer (ASTER) imagery for mapping borate minerals in the field. Borate crusts that were partially mined during the 1800s were identified and mapped at Rhodes, Teels, and Columbus Marshes (playas), all in western Nevada (Figure 1).